Knockdown stroboscope.



W. H. ZINN.

xNocKnowN 'snooscopa 4 APPLICATION FILED MPL10. |9l6. 1,214,636. Patentedv Feb. 6, 1917.

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W. H. ZINN.

KNOCKDOWN STROBOSCOPE.

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1,214,636. Patented Feb. 6,1917.

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WILLIAM H. ZINN, OF ANNISTON, ALABAMA.

XNOCKDOWN STBOBOSCOPE.

Sp'eoication of Letters Patent.

Patented Feb. 6, 1917.

Application filed January 10, 1916. Serial No. 71,238.

Tc all whom it may concern.' Be it known that I, WILLIAM H. ZINN, a

citizen of the United States, residing at Anniston, in the county of Calhoun and State .if ci Alabama, have invented a certain new and useful Knockdown Stroboscope, of which the following is a full, clear, and exact description.

My invention relates to stroboscopes, my special purpose being to give the various parts of the stroboscope such form as to enable them to be readily grouped and arranged for purposes of lshipping and then quickly assembled for conjoint use in the complete device.

More particularly stated, I seek to produce a stroboscope adapted for general use and having a soi-called knockdown construction whereby its various parts may be shipped or mailed in an ordinary envelop.

Reference is to be made to the accompany-- ing drawings forming a part of this specioation, and in which like reference characters indicate iike parts throughout the several views.

Figure 1 is a perspective of the stroboscope complete. Fig. 2 is a substantially central vertical sect1on through the same. Fig. 3 shows a blank made of cardboard or other sheet material, and which may be used in constructing the pedestal. Fig. 4 is a perspective of a block or plate used as a part 5 is a plan view of one of the'visual strips carrying the stroboscopic images. Fig. 6 is a plan view of a card of sheet material provided with slots and adapted to be formed into the imagecylinder. Fig. 7 is a plan view of a blank to be used as the bottom of the image cylinder. Fig. 8 is a top view, partly in plan and partly broken away, showing the base plate of the device.

A pedestal 9 is Amade of sheet material of any appropriate kind Such, for instance, las thick cardboard. The pedestal has in this' instance the proximate form of a pyramid, but this exact shape is not essential. A base plate 10 engages the lower end of the pedestal, which for this purpose is provided with a sunken portion 11, the outer portion of the base plate sloping upwardly to the top of the sunken portion, as may be understood more particularly from Fig. 2. In the construction of the pedestal I sometimes prefer to use the blank shown in Fig. 3 and having the general form vof a Maltese cross. That is, a middle panel 9 of square form is integrally connected With four panels 9", each having its greatest width at its outer end. If desired, however, the panels 9 and 9" may be separate pieces, which are put together and secured in any suitable manner. A block 12, made in this instance of wood, is

secured to the panel 9, and forms a part of' the pedestal. A pivot pin 13, which may be of any suitable material, extends upwardly through the top of the pedestal.

Any pivot pin; will answer. A second block 14 carries Ya pivot cap 15 which fits loosely but neatly upon the upper end of the pivot pin 13. The block 14 is secured to a disk 16, through which the pivot cap extends. The blocks 12 and 14 need not necessarily be made of wood. They may be plates or bits of thick pasteboard, cardboard or other appropriate sheet material.

The disk 16 is made of any suitable sheet material, and in this particular instance is of cardboard. It carries a number of ton es 17 each integral with it and exten ing radially outward from it. The disk 16 is'I provided centrally with a hole 168l through which the pivot cap 15 extends.

The image cylinder is shown at 18a, and is 19. The image provided with image slots cylinder is made from a blank 18, having the general form of a card, as shown in Fig. 6. This blank has a number of slots 19a out in it and adapted to serve, after the completion of the cylinder, as image slots 19. The blank v18a `is further provided with a number of anchor slots 20, for receiving the tongues' 17. The card 18 and disk 16 are so formed and proportioned that the card may be bent around the edge of the disk, and thus brought substantially into cylindrical form, the tongues 17 being thrust throughthe anchor slots and caused to protrude radially outward, as indicated in Fig. 1. The ends of the card being thus brought together, suitable means. While in this particular instance the image cylinder has atrue cylindrical form, I do not limit myself thereby as it may be polygonal or have any other form which approximates that 0f a cylinder.

In Fig. 5 is shown an image band, carrying a number of separate but related images 22, 23, 24, 25, each representing a figure or scene diering from the others by graded changes in posture or position, somewhat after the manner of successive images upon a moving picture lm. Each image band they are secured by any has the form of a longitudinal strip or card, which may be bent into the form oilD a cir cle and disposed within the image cylinder; Any number of the image bands may be employed. l

The operation of my device is as iollows :-'l`he several parts being made and assembled as above described, and a ilm band being placedA within the image cylinder as stated and as shown in Fig. 2, the opera-4 ,tor turns the image cylinder. For this purpose he may gently strike one or more of the tongues 17 with his ngers, or he may simply spin the cylinder in any convenient manner, as desired. Spectators now looking through the image slots at the images see the latter apparently in motion.

l invite special attention to the fact that the knockdown stroboscope constructed as above described is well adapted fortransportation. lt may be sent through the mails, and if shipped by express or by treight it occupies a minimum ot room. It is admirably suitable for a mail-order business7 owing to the lightness with which the various parts may be made and the compact form in which they can be grouped together for transportation. The same envelop in which the parts are shipped or otherwise transported may serve conveniently as a package itor holding the parts after their transportation and when not in use.

naiaeae ll do not limit myself to the precise mechanism shown, as variations may bef-made therefrom without departing from the spirit of my invention.A

What l claimas new and desire to secure by Letters Patent is as follows l, In a knockdown stroboscope the com-v slots to engage said tongues and also having image slots, said blank being bendable so as to form an image cylinder around said disk. 3. ln a stroboscope the combination of -a Adisk made of sheet material and provided with tongues extending radially outward and a blank having the general form of a card and provided with openings for receiving said tongue in order to support said blank when the latter is bent substantially into the form of a cylinder, said blank being further provided with image slots and with images and being normally flat so thatsaid blank and said disk may be packed in compact form.

WILLM H. ZINN. 

